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/*
* Copyright 2011 The Android Open Source Project
*
* Use of this source code is governed by a BSD-style license that can be
* found in the LICENSE file.
*/
#ifndef SKFONTCONFIGPARSER_ANDROID_H_
#define SKFONTCONFIGPARSER_ANDROID_H_
#include "SkFontMgr_android.h"
#include "SkString.h"
#include "SkTDArray.h"
/** \class SkLanguage
The SkLanguage class represents a human written language, and is used by
text draw operations to determine which glyph to draw when drawing
characters with variants (ie Han-derived characters).
*/
class SkLanguage {
public:
SkLanguage() { }
SkLanguage(const SkString& tag) : fTag(tag) { }
SkLanguage(const char* tag) : fTag(tag) { }
SkLanguage(const char* tag, size_t len) : fTag(tag, len) { }
SkLanguage(const SkLanguage& b) : fTag(b.fTag) { }
/** Gets a BCP 47 language identifier for this SkLanguage.
@return a BCP 47 language identifier representing this language
*/
const SkString& getTag() const { return fTag; }
/** Performs BCP 47 fallback to return an SkLanguage one step more general.
@return an SkLanguage one step more general
*/
SkLanguage getParent() const;
bool operator==(const SkLanguage& b) const {
return fTag == b.fTag;
}
bool operator!=(const SkLanguage& b) const {
return fTag != b.fTag;
}
SkLanguage& operator=(const SkLanguage& b) {
fTag = b.fTag;
return *this;
}
private:
//! BCP 47 language identifier
SkString fTag;
};
enum FontVariants {
kDefault_FontVariant = 0x01,
kCompact_FontVariant = 0x02,
kElegant_FontVariant = 0x04,
kLast_FontVariant = kElegant_FontVariant,
};
typedef uint32_t FontVariant;
// Must remain trivially movable (can be memmoved).
struct FontFileInfo {
FontFileInfo() : fIndex(0), fWeight(0), fStyle(Style::kAuto) { }
SkString fFileName;
int fIndex;
int fWeight;
enum class Style { kAuto, kNormal, kItalic } fStyle;
};
/**
* A font family provides one or more names for a collection of fonts, each of
* which has a different style (normal, italic) or weight (thin, light, bold,
* etc).
* Some fonts may occur in compact variants for use in the user interface.
* Android distinguishes "fallback" fonts to support non-ASCII character sets.
*/
struct FontFamily {
FontFamily(const SkString& basePath, bool isFallbackFont)
: fVariant(kDefault_FontVariant)
, fOrder(-1)
, fIsFallbackFont(isFallbackFont)
, fBasePath(basePath)
{ }
SkTArray<SkString, true> fNames;
SkTArray<FontFileInfo, true> fFonts;
SkLanguage fLanguage;
FontVariant fVariant;
int fOrder; // internal to SkFontConfigParser
bool fIsFallbackFont;
const SkString fBasePath;
};
namespace SkFontConfigParser {
/** Parses system font configuration files and appends result to fontFamilies. */
void GetSystemFontFamilies(SkTDArray<FontFamily*>& fontFamilies);
/** Parses font configuration files and appends result to fontFamilies. */
void GetCustomFontFamilies(SkTDArray<FontFamily*>& fontFamilies,
const SkString& basePath,
const char* fontsXml,
const char* fallbackFontsXml,
const char* langFallbackFontsDir = NULL);
} // SkFontConfigParser namespace
#endif /* SKFONTCONFIGPARSER_ANDROID_H_ */
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